Lucent Technologies Definity Enterprise Communication Server 8.2 User Manual

Issue 1

April 2000

Managing multimedia calling 

234

Multimedia Call Handling 

The Enhanced multimedia complex provides a much more tightly coupled 
integration of the complex voice station and H.320 DVC system. In Enhanced 
Mode:

■

Both multimedia and voice calls must originate at the telephone set.

■

Voice and multimedia calls can be controlled at the telephone set.

■

Conferencing is spontaneous and established just like a voice-only 
conference call.

■

There is extensive support for multimedia feature interaction. Most voice 
features work the same for multimedia calls.

■

Service Links can be either “permanent” or “as-needed.”

The physical components necessary to utilize MMCH capabilities include:

■

H.320 DVC systems that are BRI connected to the DEFINITY ECS.

■

Non-BRI multifunction telephones.

■

DEFINITY TN787 MultiMedia Interface (MMI) and TN788 Voice 
Conditioner (VC) boards.

■

A T.120 Enhanced Services Module (ESM) server (necessary only if you 
plan to do T.210 data collaboration). Connectivity of the ESM requires an 
additional TN787 along with a TN2207 DS1 circuit pack.

Both Basic and Enhanced multimedia complexes are dual-port desktops that 
consist of:

■

a BRI-connected multimedia-equipped PC that supports the H.320 protocol

■

a non-BRI-connected multifunction telephone set. 

The PC and the multifunction telephone are individually wired to the DEFINITY 
ECS. These two pieces of equipment can be administratively associated to form a 
Basic or ENHANCED multimedia complex 

MMCH works with any H.320 system that is fully H.320 compliant and operates 
at the 2B or 128K rate. 

If you intend to share applications among users or whiteboard capabilities, 
the endpoint software you choose must also support the T.120 protocol.